TY - THES

T1 - Automation and Evaluation of Flash-Thermographic Inspections

AU - Grandl, Thomas

N1 - no embargo

PY - 2017

Y1 - 2017

N2 - This thesis addresses the design, construction and software implementation of an active flash thermographic test rig. Thermography belongs to the class of non-destructive material testing methods. The aim of this work is to implement a flexible test rig which simplifies flash thermographic tests on specific test objectives. This includes the acquisition of a time-series of images during a flash-thermographic process, as well as the analysis of the data image using predefined evaluation methods. To this end a series of standard thermographic computational procedures are implemented and where required extended. The results of these computations are compared for different reference specimens. Furthermore, functions have been developed which enable the software to automatically detect defects in a specimen in qualitative and quantitative manner. The software therefore applies different image processing techniques on the results of the evaluation methods. This shall be seen as preparation for an automatic and autonomous operation in industrial applications.

AB - This thesis addresses the design, construction and software implementation of an active flash thermographic test rig. Thermography belongs to the class of non-destructive material testing methods. The aim of this work is to implement a flexible test rig which simplifies flash thermographic tests on specific test objectives. This includes the acquisition of a time-series of images during a flash-thermographic process, as well as the analysis of the data image using predefined evaluation methods. To this end a series of standard thermographic computational procedures are implemented and where required extended. The results of these computations are compared for different reference specimens. Furthermore, functions have been developed which enable the software to automatically detect defects in a specimen in qualitative and quantitative manner. The software therefore applies different image processing techniques on the results of the evaluation methods. This shall be seen as preparation for an automatic and autonomous operation in industrial applications.

KW - thermography

KW - active thermography

KW - flash thermography

KW - Parker's method

KW - TSR

KW - PPT

KW - non-destructive material testing

KW - image processing

KW - infrared radiation

KW - heat conduction

KW - Thermographie

KW - aktive Thermographie

KW - Blitz-Thermographie

KW - Parker's Methode

KW - TSR

KW - PPT

KW - zerstörungsfreie Werkstoffprüfung

KW - Bildverarbeitung

KW - Infrarotstrahlung

KW - Wärmeleitung

M3 - Master's Thesis

ER -